Description of Business and Summary of Significant Accounting Policies (AntiDilutive) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share        
Total (in shares) 2,687 1,245 4,883 912
Options to purchase common stock        
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share        
Total (in shares) 2,687 1,245 4,796 912
Restricted stock units        
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share        
Total (in shares)     87